ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
Adaptive immune responses are slow to develop, taking days to weeks after exposure to reach their peak. However, these responses are more specific than innate responses, and also generate immunological memory. These latter features, which provide enhanced protection upon re-infection with the same pathogen, are the basis of:
Correct Answer: A
Rationale: Vaccines exploit specificity and memory of adaptive immunity; antibiotics target bacteria, shock is a reaction, complement is innate.
Question 2 of 5
Hepatitis C is a virus that infects hepatocytes, which are non-immune cells of the liver. Currently, patients with chronic Hepatitis C infections are treated with repeated administration of type I interferon, predominantly interferon α. One aspect of this treatment that might aid the patient's immune system in clearing this virus infection is:
Correct Answer: A
Rationale: Type I interferon boosts MHC I on hepatocytes , aiding CD8 T cells; macrophage action or inflammation are less direct.
Question 3 of 5
is a gaseous by-product of natural gas combustion plant hormone
Correct Answer: C
Rationale: Ethylene is a gaseous plant hormone, sometimes linked to combustion byproducts, while auxin and gibberellins are not gaseous.
Question 4 of 5
A molecule that can elicit an adaptive immune response is called
Correct Answer: D
Rationale: An antigen triggers adaptive immunity by being recognized by lymphocytes, unlike complement (innate), interferon (antiviral), or antibodies (response products).
Question 5 of 5
After binding to an infected cell, the cytotoxic T cell
Correct Answer: D
Rationale: Cytotoxic T cells release perforin to lyse infected cells, not interleukin-1, phagocytosis, or neutralization.